I've never seen a striker play with his back to goal so much. He will never form a partnership with Aguero for many reasons.
It's like he was playing pivot in handball when he was young. Or futsal, he'd be good with that butt pivoting in futsal. But he does it as it is pretty much the only thing he is good at, he is strong as ironman and it's not easy for defender to come in front of him in such situations.
But out of that zero striking intelligence. Awful positioning, won't run into the channel if his life would depend on it, no pace or work rate whatsoever etc, etc.